source3/modules/vfs_smb_traffic_analyzer.c

   1 /*
   2  * traffic-analyzer VFS module. Measure the smb traffic users create
   3  * on the net.
   4  *
   5  * Copyright (C) Holger Hetterich, 2008-2010
   6  * Copyright (C) Jeremy Allison, 2008
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 3 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  20  */
  21
  22 #include "includes.h"
  23 #include "smbd/smbd.h"
  24 #include "../smbd/globals.h"
  25 #include "../lib/crypto/crypto.h"
  26 #include "vfs_smb_traffic_analyzer.h"
  27 #include "../libcli/security/security.h"
  28 #include "secrets.h"
  29 #include "../librpc/gen_ndr/ndr_netlogon.h"
  30
  31 /* abstraction for the send_over_network function */
  32 enum sock_type {INTERNET_SOCKET = 0, UNIX_DOMAIN_SOCKET};
  33
  34 #define LOCAL_PATHNAME "/var/tmp/stadsocket"
  35
  36 static int vfs_smb_traffic_analyzer_debug_level = DBGC_VFS;
  37
  38 static enum sock_type smb_traffic_analyzer_connMode(vfs_handle_struct *handle)
  39 {
  40         connection_struct *conn = handle->conn;
  41         const char *Mode;
  42         Mode=lp_parm_const_string(SNUM(conn), "smb_traffic_analyzer","mode", \
  43                         "internet_socket");
  44         if (strstr(Mode,"unix_domain_socket")) {
  45                 return UNIX_DOMAIN_SOCKET;
  46         } else {
  47                 return INTERNET_SOCKET;
  48         }
  49 }
  50
  51
  52 /* Connect to an internet socket */
  53 static int smb_traffic_analyzer_connect_inet_socket(vfs_handle_struct *handle,
  54                                         const char *name, uint16_t port)
  55 {
  56         /* Create a streaming Socket */
  57         int sockfd = -1;
  58         struct addrinfo hints;
  59         struct addrinfo *ailist = NULL;
  60         struct addrinfo *res = NULL;
  61         int ret;
  62
  63         ZERO_STRUCT(hints);
  64         /* By default make sure it supports TCP. */
  65         hints.ai_socktype = SOCK_STREAM;
  66         hints.ai_flags = AI_ADDRCONFIG;
  67
  68         ret = getaddrinfo(name,
  69                         NULL,
  70                         &hints,
  71                         &ailist);
  72
  73         if (ret) {
  74                 DEBUG(3,("smb_traffic_analyzer_connect_inet_socket: "
  75                         "getaddrinfo failed for name %s [%s]\n",
  76                         name,
  77                         gai_strerror(ret) ));
  78                 return -1;
  79         }
  80
  81         DEBUG(3,("smb_traffic_analyzer: Internet socket mode. Hostname: %s,"
  82                 "Port: %i\n", name, port));
  83
  84         for (res = ailist; res; res = res->ai_next) {
  85                 struct sockaddr_storage ss;
  86                 NTSTATUS status;
  87
  88                 if (!res->ai_addr || res->ai_addrlen == 0) {
  89                         continue;
  90                 }
  91
  92                 ZERO_STRUCT(ss);
  93                 memcpy(&ss, res->ai_addr, res->ai_addrlen);
  94
  95                 status = open_socket_out(&ss, port, 10000, &sockfd);
  96                 if (NT_STATUS_IS_OK(status)) {
  97                         break;
  98                 }
  99         }
 100
 101         if (ailist) {
 102                 freeaddrinfo(ailist);
 103         }
 104
 105         if (sockfd == -1) {
 106                 DEBUG(1, ("smb_traffic_analyzer: unable to create "
 107                         "socket, error is %s",
 108                         strerror(errno)));
 109                 return -1;
 110         }
 111
 112         return sockfd;
 113 }
 114
 115 /* Connect to a unix domain socket */
 116 static int smb_traffic_analyzer_connect_unix_socket(vfs_handle_struct *handle,
 117                                                 const char *name)
 118 {
 119         /* Create the socket to stad */
 120         int len, sock;
 121         struct sockaddr_un remote;
 122
 123         DEBUG(7, ("smb_traffic_analyzer_connect_unix_socket: "
 124                         "Unix domain socket mode. Using %s\n",
 125                         name ));
 126
 127         if ((sock = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
 128                 DEBUG(1, ("smb_traffic_analyzer_connect_unix_socket: "
 129                         "Couldn't create socket, "
 130                         "make sure stad is running!\n"));
 131                 return -1;
 132         }
 133         remote.sun_family = AF_UNIX;
 134         strlcpy(remote.sun_path, name,
 135                     sizeof(remote.sun_path));
 136         len=strlen(remote.sun_path) + sizeof(remote.sun_family);
 137         if (connect(sock, (struct sockaddr *)&remote, len) == -1 ) {
 138                 DEBUG(1, ("smb_traffic_analyzer_connect_unix_socket: "
 139                         "Could not connect to "
 140                         "socket, make sure\nstad is running!\n"));
 141                 close(sock);
 142                 return -1;
 143         }
 144         return sock;
 145 }
 146
 147 /* Private data allowing shared connection sockets. */
 148 struct refcounted_sock {
 149         struct refcounted_sock *next, *prev;
 150         char *name;
 151         uint16_t port;
 152         int sock;
 153         unsigned int ref_count;
 154 };
 155
 156
 157 /**
 158  * Encryption of a data block with AES
 159  * TALLOC_CTX *ctx      Talloc context to work on
 160  * const char *akey     128bit key for the encryption
 161  * const char *str      Data buffer to encrypt, \0 terminated
 162  * int *len             Will be set to the length of the
 163  *                      resulting data block
 164  * The caller has to take care for the memory
 165  * allocated on the context.
 166  */
 167 static char *smb_traffic_analyzer_encrypt( TALLOC_CTX *ctx,
 168         const char *akey, const char *str, size_t *len)
 169 {
 170         int s1,s2,h,d;
 171         AES_KEY key;
 172         unsigned char filler[17]= "................";
 173         char *output;
 174         unsigned char crypted[18];
 175         if (akey == NULL) return NULL;
 176         samba_AES_set_encrypt_key((unsigned char *) akey, 128, &key);
 177         s1 = strlen(str) / 16;
 178         s2 = strlen(str) % 16;
 179         for (h = 0; h < s2; h++) *(filler+h)=*(str+(s1*16)+h);
 180         DEBUG(10, ("smb_traffic_analyzer_send_data_socket: created %s"
 181                 " as filling block.\n", filler));
 182         output = talloc_array(ctx, char, (s1*16)+17 );
 183         d=0;
 184         for (h = 0; h < s1; h++) {
 185                 samba_AES_encrypt((unsigned char *) str+(16*h), crypted, &key);
 186                 for (d = 0; d<16; d++) output[d+(16*h)]=crypted[d];
 187         }
 188         samba_AES_encrypt( (unsigned char *) str+(16*h), filler, &key );
 189         for (d = 0;d < 16; d++) output[d+(16*h)]=*(filler+d);
 190         *len = (s1*16)+16;
 191         return output;
 192 }
 193
 194 /**
 195  * Create a v2 header.
 196  * TALLLOC_CTX *ctx             Talloc context to work on
 197  * const char *state_flags      State flag string
 198  * int len                      length of the data block
 199  */
 200 static char *smb_traffic_analyzer_create_header( TALLOC_CTX *ctx,
 201         const char *state_flags, size_t data_len)
 202 {
 203         char *header = talloc_asprintf( ctx, "V2.%s%017u",
 204                                         state_flags, (unsigned int) data_len);
 205         DEBUG(10, ("smb_traffic_analyzer_send_data_socket: created Header:\n"));
 206         dump_data(10, (uint8_t *)header, strlen(header));
 207         return header;
 208 }
 209
 210
 211 /**
 212  * Actually send header and data over the network
 213  * char *header         Header data
 214  * char *data           Data Block
 215  * int dlength          Length of data block
 216  * int socket
 217  */
 218 static void smb_traffic_analyzer_write_data( char *header, char *data,
 219                         int dlength, int _socket)
 220 {
 221                 int len = strlen(header);
 222                 if (write_data( _socket, header, len) != len) {
 223                         DEBUG(1, ("smb_traffic_analyzer_send_data_socket: "
 224                                                 "error sending the header"
 225                                                 " over the socket!\n"));
 226                 }
 227                 DEBUG(10,("smb_traffic_analyzer_write_data: sending data:\n"));
 228                 dump_data( 10, (uint8_t *)data, dlength);
 229
 230                 if (write_data( _socket, data, dlength) != dlength) {
 231                         DEBUG(1, ("smb_traffic_analyzer_write_data: "
 232                                 "error sending crypted data to socket!\n"));
 233                 }
 234 }
 235
 236
 237 /*
 238  * Anonymize a string if required.
 239  * TALLOC_CTX *ctx                      The talloc context to work on
 240  * const char *str                      The string to anonymize
 241  * vfs_handle_struct *handle            The handle struct to work on
 242  *
 243  * Returns a newly allocated string, either the anonymized one,
 244  * or a copy of const char *str. The caller has to take care for
 245  * freeing the allocated memory.
 246  */
 247 static char *smb_traffic_analyzer_anonymize( TALLOC_CTX *ctx,
 248                                         const char *str,
 249                                         vfs_handle_struct *handle )
 250 {
 251         const char *total_anonymization;
 252         const char *anon_prefix;
 253         char *output;
 254         total_anonymization=lp_parm_const_string(SNUM(handle->conn),
 255                                         "smb_traffic_analyzer",
 256                                         "total_anonymization", NULL);
 257
 258         anon_prefix=lp_parm_const_string(SNUM(handle->conn),
 259                                         "smb_traffic_analyzer",
 260                                         "anonymize_prefix", NULL );
 261         if (anon_prefix != NULL) {
 262                 if (total_anonymization != NULL) {
 263                         output = talloc_asprintf(ctx, "%s",
 264                                         anon_prefix);
 265                 } else {
 266                 output = talloc_asprintf(ctx, "%s%i", anon_prefix,
 267                                                 str_checksum(str));
 268                 }
 269         } else {
 270                 output = talloc_asprintf(ctx, "%s", str);
 271         }
 272
 273         return output;
 274 }
 275
 276
 277 /**
 278  * The marshalling function for protocol v2.
 279  * TALLOC_CTX *ctx              Talloc context to work on
 280  * struct tm *tm                tm struct for the timestamp
 281  * int seconds                  milliseconds of the timestamp
 282  * vfs_handle_struct *handle    vfs_handle_struct
 283  * char *username               Name of the user
 284  * int vfs_operation            VFS operation identifier
 285  * int count                    Number of the common data blocks
 286  * [...] variable args          data blocks taken from the individual
 287  *                              VFS data structures
 288  *
 289  * Returns the complete data block to send. The caller has to
 290  * take care for freeing the allocated buffer.
 291  */
 292 static char *smb_traffic_analyzer_create_string( TALLOC_CTX *ctx,
 293         struct tm *tm, int seconds, vfs_handle_struct *handle, \
 294         char *username, int vfs_operation, int count, ... )
 295 {
 296
 297         va_list ap;
 298         char *arg = NULL;
 299         int len;
 300         char *common_data_count_str = NULL;
 301         char *timestr = NULL;
 302         char *sidstr = NULL;
 303         char *usersid = NULL;
 304         char *buf = NULL;
 305         char *vfs_operation_str = NULL;
 306         const char *service_name = lp_const_servicename(handle->conn->params->service);
 307
 308         /*
 309          * first create the data that is transfered with any VFS op
 310          * These are, in the following order:
 311          *(0) number of data to come [6 in v2.0]
 312          * 1.vfs_operation identifier
 313          * 2.username
 314          * 3.user-SID
 315          * 4.affected share
 316          * 5.domain
 317          * 6.timestamp
 318          * 7.IP Addresss of client
 319          */
 320
 321         /*
 322          * number of common data blocks to come,
 323          * this is a #define in vfs_smb_traffic_anaylzer.h,
 324          * it's length is known at compile time
 325          */
 326         common_data_count_str = talloc_strdup( ctx, SMBTA_COMMON_DATA_COUNT);
 327         /* vfs operation identifier */
 328         vfs_operation_str = talloc_asprintf( common_data_count_str, "%i",
 329                                                         vfs_operation);
 330         /*
 331          * Handle anonymization. In protocol v2, we have to anonymize
 332          * both the SID and the username. The name is already
 333          * anonymized if needed, by the calling function.
 334          */
 335         usersid = dom_sid_string( common_data_count_str,
 336                 &handle->conn->session_info->security_token->sids[0]);
 337
 338         sidstr = smb_traffic_analyzer_anonymize(
 339                 common_data_count_str,
 340                 usersid,
 341                 handle);
 342
 343         /* time stamp */
 344         timestr = talloc_asprintf( common_data_count_str, \
 345                 "%04d-%02d-%02d %02d:%02d:%02d.%03d", \
 346                 tm->tm_year+1900, \
 347                 tm->tm_mon+1, \
 348                 tm->tm_mday, \
 349                 tm->tm_hour, \
 350                 tm->tm_min, \
 351                 tm->tm_sec, \
 352                 (int)seconds);
 353         len = strlen( timestr );
 354         /* create the string of common data */
 355         buf = talloc_asprintf(ctx,
 356                 "%s%04u%s%04u%s%04u%s%04u%s%04u%s%04u%s%04u%s",
 357                 common_data_count_str,
 358                 (unsigned int) strlen(vfs_operation_str),
 359                 vfs_operation_str,
 360                 (unsigned int) strlen(username),
 361                 username,
 362                 (unsigned int) strlen(sidstr),
 363                 sidstr,
 364                 (unsigned int) strlen(service_name),
 365                 service_name,
 366                 (unsigned int)
 367                 strlen(handle->conn->session_info->info3->base.domain.string),
 368                 handle->conn->session_info->info3->base.domain.string,
 369                 (unsigned int) strlen(timestr),
 370                 timestr,
 371                 (unsigned int) strlen(handle->conn->sconn->client_id.addr),
 372                 handle->conn->sconn->client_id.addr);
 373
 374         talloc_free(common_data_count_str);
 375
 376         /* data blocks depending on the VFS function */
 377         va_start( ap, count );
 378         while ( count-- ) {
 379                 arg = va_arg( ap, char * );
 380                 /*
 381                  *  protocol v2 sends a four byte string
 382                  * as a header to each block, including
 383                  * the numbers of bytes to come in the
 384                  * next string.
 385                  */
 386                 len = strlen( arg );
 387                 buf = talloc_asprintf_append( buf, "%04u%s", len, arg);
 388         }
 389         va_end( ap );
 390         return buf;
 391 }
 392
 393 static void smb_traffic_analyzer_send_data(vfs_handle_struct *handle,
 394                                         void *data,
 395                                         enum vfs_id vfs_operation )
 396 {
 397         struct refcounted_sock *rf_sock = NULL;
 398         struct timeval tv;
 399         time_t tv_sec;
 400         struct tm *tm = NULL;
 401         int seconds;
 402         char *str = NULL;
 403         char *username = NULL;
 404         char *header = NULL;
 405         const char *protocol_version = NULL;
 406         bool Write = false;
 407         size_t len;
 408         size_t size;
 409         char *akey, *output;
 410
 411         /*
 412          * The state flags are part of the header
 413          * and are descripted in the protocol description
 414          * in vfs_smb_traffic_analyzer.h. They begin at byte
 415          * 03 of the header.
 416          */
 417         char state_flags[9] = "000000\0";
 418
 419         SMB_VFS_HANDLE_GET_DATA(handle, rf_sock, struct refcounted_sock, return);
 420
 421         if (rf_sock == NULL || rf_sock->sock == -1) {
 422                 DEBUG(1, ("smb_traffic_analyzer_send_data: socket is "
 423                         "closed\n"));
 424                 return;
 425         }
 426
 427         GetTimeOfDay(&tv);
 428         tv_sec = tv.tv_sec;
 429         tm = localtime(&tv_sec);
 430         if (!tm) {
 431                 return;
 432         }
 433         seconds=(float) (tv.tv_usec / 1000);
 434
 435         /*
 436          * Check if anonymization is required, and if yes do this only for
 437          * the username here, needed vor protocol version 1. In v2 we
 438          * additionally anonymize the SID, which is done in it's marshalling
 439          * function.
 440          */
 441         username = smb_traffic_analyzer_anonymize( talloc_tos(),
 442                         handle->conn->session_info->sanitized_username,
 443                         handle);
 444
 445         if (!username) {
 446                 return;
 447         }
 448
 449         protocol_version = lp_parm_const_string(SNUM(handle->conn),
 450                                         "smb_traffic_analyzer",
 451                                         "protocol_version", NULL );
 452
 453
 454         if ( protocol_version == NULL || strcmp( protocol_version,"V1") == 0) {
 455
 456                 struct rw_data *s_data = (struct rw_data *) data;
 457
 458                 /*
 459                  * in case of protocol v1, ignore any vfs operations
 460                  * except read,pread,write,pwrite, and set the "Write"
 461                  * bool accordingly, send data and return.
 462                  */
 463                 if ( vfs_operation > vfs_id_pwrite ) return;
 464
 465                 if ( vfs_operation <= vfs_id_pread ) Write=false;
 466                         else Write=true;
 467
 468                 str = talloc_asprintf(talloc_tos(),
 469                         "V1,%u,\"%s\",\"%s\",\"%c\",\"%s\",\"%s\","
 470                         "\"%04d-%02d-%02d %02d:%02d:%02d.%03d\"\n",
 471                         (unsigned int) s_data->len,
 472                         username,
 473                         handle->conn->session_info->info3->base.domain.string,
 474                         Write ? 'W' : 'R',
 475                         handle->conn->connectpath,
 476                         s_data->filename,
 477                         tm->tm_year+1900,
 478                         tm->tm_mon+1,
 479                         tm->tm_mday,
 480                         tm->tm_hour,
 481                         tm->tm_min,
 482                         tm->tm_sec,
 483                         (int)seconds);
 484                 len = strlen(str);
 485                 if (write_data(rf_sock->sock, str, len) != len) {
 486                         DEBUG(1, ("smb_traffic_analyzer_send_data_socket: "
 487                         "error sending V1 protocol data to socket!\n"));
 488                 return;
 489                 }
 490
 491         } else if ( strcmp( protocol_version, "V2") == 0) {
 492
 493                 switch( vfs_operation ) {
 494                 case vfs_id_open: ;
 495                         str = smb_traffic_analyzer_create_string( talloc_tos(),
 496                                 tm, seconds, handle, username, vfs_id_open,
 497                                 3, ((struct open_data *) data)->filename,
 498                                 talloc_asprintf( talloc_tos(), "%u",
 499                                 ((struct open_data *) data)->mode),
 500                                 talloc_asprintf( talloc_tos(), "%u",
 501                                 ((struct open_data *) data)->result));
 502                         break;
 503                 case vfs_id_close: ;
 504                         str = smb_traffic_analyzer_create_string( talloc_tos(),
 505                                 tm, seconds, handle, username, vfs_id_close,
 506                                 2, ((struct close_data *) data)->filename,
 507                                 talloc_asprintf( talloc_tos(), "%u",
 508                                 ((struct close_data *) data)->result));
 509                         break;
 510                 case vfs_id_mkdir: ;
 511                         str = smb_traffic_analyzer_create_string( talloc_tos(),
 512                                 tm, seconds, handle, username, vfs_id_mkdir, \
 513                                 3, ((struct mkdir_data *) data)->path, \
 514                                 talloc_asprintf( talloc_tos(), "%u", \
 515                                 ((struct mkdir_data *) data)->mode), \
 516                                 talloc_asprintf( talloc_tos(), "%u", \
 517                                 ((struct mkdir_data *) data)->result ));
 518                         break;
 519                 case vfs_id_rmdir: ;
 520                         str = smb_traffic_analyzer_create_string( talloc_tos(),
 521                                 tm, seconds, handle, username, vfs_id_rmdir,
 522                                 2, ((struct rmdir_data *) data)->path, \
 523                                 talloc_asprintf( talloc_tos(), "%u", \
 524                                 ((struct rmdir_data *) data)->result ));
 525                         break;
 526                 case vfs_id_rename: ;
 527                         str = smb_traffic_analyzer_create_string( talloc_tos(),
 528                                 tm, seconds, handle, username, vfs_id_rename,
 529                                 3, ((struct rename_data *) data)->src, \
 530                                 ((struct rename_data *) data)->dst,
 531                                 talloc_asprintf(talloc_tos(), "%u", \
 532                                 ((struct rename_data *) data)->result));
 533                         break;
 534                 case vfs_id_chdir: ;
 535                         str = smb_traffic_analyzer_create_string( talloc_tos(),
 536                                 tm, seconds, handle, username, vfs_id_chdir,
 537                                 2, ((struct chdir_data *) data)->path, \
 538                                 talloc_asprintf(talloc_tos(), "%u", \
 539                                 ((struct chdir_data *) data)->result));
 540                         break;
 541
 542                 case vfs_id_write:
 543                 case vfs_id_pwrite:
 544                 case vfs_id_read:
 545                 case vfs_id_pread: ;
 546                         str = smb_traffic_analyzer_create_string( talloc_tos(),
 547                                 tm, seconds, handle, username, vfs_operation,
 548                                 2, ((struct rw_data *) data)->filename, \
 549                                 talloc_asprintf(talloc_tos(), "%u", \
 550                                 (unsigned int)
 551                                         ((struct rw_data *) data)->len));
 552                         break;
 553                 default:
 554                         DEBUG(1, ("smb_traffic_analyzer: error! "
 555                                 "wrong VFS operation id detected!\n"));
 556                         return;
 557                 }
 558
 559         } else {
 560                 DEBUG(1, ("smb_traffic_analyzer_send_data_socket: "
 561                         "error, unknown protocol given!\n"));
 562                 return;
 563         }
 564
 565         if (!str) {
 566                 DEBUG(1, ("smb_traffic_analyzer_send_data: "
 567                         "unable to create string to send!\n"));
 568                 return;
 569         }
 570
 571
 572         /*
 573          * If configured, optain the key and run AES encryption
 574          * over the data.
 575          */
 576         become_root();
 577         akey = (char *) secrets_fetch("smb_traffic_analyzer_key", &size);
 578         unbecome_root();
 579         if ( akey != NULL ) {
 580                 state_flags[2] = 'E';
 581                 DEBUG(10, ("smb_traffic_analyzer_send_data_socket: a key was"
 582                         " found, encrypting data!\n"));
 583                 output = smb_traffic_analyzer_encrypt( talloc_tos(),
 584                                                 akey, str, &len);
 585                 SAFE_FREE(akey);
 586                 header = smb_traffic_analyzer_create_header( talloc_tos(),
 587                                                 state_flags, len);
 588
 589                 DEBUG(10, ("smb_traffic_analyzer_send_data_socket:"
 590                         " header created for crypted data: %s\n", header));
 591                 smb_traffic_analyzer_write_data(header, output, len,
 592                                                         rf_sock->sock);
 593                 return;
 594
 595         }
 596
 597         len = strlen(str);
 598         header = smb_traffic_analyzer_create_header( talloc_tos(),
 599                                 state_flags, len);
 600         smb_traffic_analyzer_write_data(header, str, strlen(str),
 601                                 rf_sock->sock);
 602
 603 }
 604
 605 static struct refcounted_sock *sock_list;
 606
 607 static void smb_traffic_analyzer_free_data(void **pptr)
 608 {
 609         struct refcounted_sock *rf_sock = *(struct refcounted_sock **)pptr;
 610         if (rf_sock == NULL) {
 611                 return;
 612         }
 613         rf_sock->ref_count--;
 614         if (rf_sock->ref_count != 0) {
 615                 return;
 616         }
 617         if (rf_sock->sock != -1) {
 618                 close(rf_sock->sock);
 619         }
 620         DLIST_REMOVE(sock_list, rf_sock);
 621         TALLOC_FREE(rf_sock);
 622 }
 623
 624 static int smb_traffic_analyzer_connect(struct vfs_handle_struct *handle,
 625                          const char *service,
 626                          const char *user)
 627 {
 628         connection_struct *conn = handle->conn;
 629         enum sock_type st = smb_traffic_analyzer_connMode(handle);
 630         struct refcounted_sock *rf_sock = NULL;
 631         const char *name = (st == UNIX_DOMAIN_SOCKET) ? LOCAL_PATHNAME :
 632                                 lp_parm_const_string(SNUM(conn),
 633                                         "smb_traffic_analyzer",
 634                                 "host", "localhost");
 635         uint16_t port = (st == UNIX_DOMAIN_SOCKET) ? 0 :
 636                                 atoi( lp_parm_const_string(SNUM(conn),
 637                                 "smb_traffic_analyzer", "port", "9430"));
 638         int ret = SMB_VFS_NEXT_CONNECT(handle, service, user);
 639
 640         if (ret < 0) {
 641                 return ret;
 642         }
 643
 644         /* Are we already connected ? */
 645         for (rf_sock = sock_list; rf_sock; rf_sock = rf_sock->next) {
 646                 if (port == rf_sock->port &&
 647                                 (strcmp(name, rf_sock->name) == 0)) {
 648                         break;
 649                 }
 650         }
 651
 652         /* If we're connected already, just increase the
 653          * reference count. */
 654         if (rf_sock) {
 655                 rf_sock->ref_count++;
 656         } else {
 657                 /* New connection. */
 658                 rf_sock = TALLOC_ZERO_P(NULL, struct refcounted_sock);
 659                 if (rf_sock == NULL) {
 660                         SMB_VFS_NEXT_DISCONNECT(handle);
 661                         errno = ENOMEM;
 662                         return -1;
 663                 }
 664                 rf_sock->name = talloc_strdup(rf_sock, name);
 665                 if (rf_sock->name == NULL) {
 666                         SMB_VFS_NEXT_DISCONNECT(handle);
 667                         TALLOC_FREE(rf_sock);
 668                         errno = ENOMEM;
 669                         return -1;
 670                 }
 671                 rf_sock->port = port;
 672                 rf_sock->ref_count = 1;
 673
 674                 if (st == UNIX_DOMAIN_SOCKET) {
 675                         rf_sock->sock = smb_traffic_analyzer_connect_unix_socket(handle,
 676                                                         name);
 677                 } else {
 678
 679                         rf_sock->sock = smb_traffic_analyzer_connect_inet_socket(handle,
 680                                                         name,
 681                                                         port);
 682                 }
 683                 if (rf_sock->sock == -1) {
 684                         SMB_VFS_NEXT_DISCONNECT(handle);
 685                         TALLOC_FREE(rf_sock);
 686                         return -1;
 687                 }
 688                 DLIST_ADD(sock_list, rf_sock);
 689         }
 690
 691         /* Store the private data. */
 692         SMB_VFS_HANDLE_SET_DATA(handle, rf_sock, smb_traffic_analyzer_free_data,
 693                                 struct refcounted_sock, return -1);
 694         return 0;
 695 }
 696
 697 /* VFS Functions */
 698 static int smb_traffic_analyzer_chdir(vfs_handle_struct *handle, \
 699                         const char *path)
 700 {
 701         struct chdir_data s_data;
 702         s_data.result = SMB_VFS_NEXT_CHDIR(handle, path);
 703         s_data.path = path;
 704         DEBUG(10, ("smb_traffic_analyzer_chdir: CHDIR: %s\n", path));
 705         smb_traffic_analyzer_send_data(handle, &s_data, vfs_id_chdir);
 706         return s_data.result;
 707 }
 708
 709 static int smb_traffic_analyzer_rename(vfs_handle_struct *handle, \
 710                 const struct smb_filename *smb_fname_src,
 711                 const struct smb_filename *smb_fname_dst)
 712 {
 713         struct rename_data s_data;
 714         s_data.result = SMB_VFS_NEXT_RENAME(handle, smb_fname_src, \
 715                 smb_fname_dst);
 716         s_data.src = smb_fname_src->base_name;
 717         s_data.dst = smb_fname_dst->base_name;
 718         DEBUG(10, ("smb_traffic_analyzer_rename: RENAME: %s / %s\n",
 719                 smb_fname_src->base_name,
 720                 smb_fname_dst->base_name));
 721         smb_traffic_analyzer_send_data(handle, &s_data, vfs_id_rename);
 722         return s_data.result;
 723 }
 724
 725 static int smb_traffic_analyzer_rmdir(vfs_handle_struct *handle, \
 726                         const char *path)
 727 {
 728         struct rmdir_data s_data;
 729         s_data.result = SMB_VFS_NEXT_RMDIR(handle, path);
 730         s_data.path = path;
 731         DEBUG(10, ("smb_traffic_analyzer_rmdir: RMDIR: %s\n", path));
 732         smb_traffic_analyzer_send_data(handle, &s_data, vfs_id_rmdir);
 733         return s_data.result;
 734 }
 735
 736 static int smb_traffic_analyzer_mkdir(vfs_handle_struct *handle, \
 737                         const char *path, mode_t mode)
 738 {
 739         struct mkdir_data s_data;
 740         s_data.result = SMB_VFS_NEXT_MKDIR(handle, path, mode);
 741         s_data.path = path;
 742         s_data.mode = mode;
 743         DEBUG(10, ("smb_traffic_analyzer_mkdir: MKDIR: %s\n", path));
 744         smb_traffic_analyzer_send_data(handle,
 745                         &s_data,
 746                         vfs_id_mkdir);
 747         return s_data.result;
 748 }
 749
 750 static ssize_t smb_traffic_analyzer_read(vfs_handle_struct *handle, \
 751                                 files_struct *fsp, void *data, size_t n)
 752 {
 753         struct rw_data s_data;
 754
 755         s_data.len = SMB_VFS_NEXT_READ(handle, fsp, data, n);
 756         s_data.filename = fsp->fsp_name->base_name;
 757         DEBUG(10, ("smb_traffic_analyzer_read: READ: %s\n", fsp_str_dbg(fsp)));
 758
 759         smb_traffic_analyzer_send_data(handle,
 760                         &s_data,
 761                         vfs_id_read);
 762         return s_data.len;
 763 }
 764
 765
 766 static ssize_t smb_traffic_analyzer_pread(vfs_handle_struct *handle, \
 767                 files_struct *fsp, void *data, size_t n, SMB_OFF_T offset)
 768 {
 769         struct rw_data s_data;
 770
 771         s_data.len = SMB_VFS_NEXT_PREAD(handle, fsp, data, n, offset);
 772         s_data.filename = fsp->fsp_name->base_name;
 773         DEBUG(10, ("smb_traffic_analyzer_pread: PREAD: %s\n",
 774                    fsp_str_dbg(fsp)));
 775
 776         smb_traffic_analyzer_send_data(handle,
 777                         &s_data,
 778                         vfs_id_pread);
 779
 780         return s_data.len;
 781 }
 782
 783 static ssize_t smb_traffic_analyzer_write(vfs_handle_struct *handle, \
 784                         files_struct *fsp, const void *data, size_t n)
 785 {
 786         struct rw_data s_data;
 787
 788         s_data.len = SMB_VFS_NEXT_WRITE(handle, fsp, data, n);
 789         s_data.filename = fsp->fsp_name->base_name;
 790         DEBUG(10, ("smb_traffic_analyzer_write: WRITE: %s\n",
 791                    fsp_str_dbg(fsp)));
 792
 793         smb_traffic_analyzer_send_data(handle,
 794                         &s_data,
 795                         vfs_id_write);
 796         return s_data.len;
 797 }
 798
 799 static ssize_t smb_traffic_analyzer_pwrite(vfs_handle_struct *handle, \
 800              files_struct *fsp, const void *data, size_t n, SMB_OFF_T offset)
 801 {
 802         struct rw_data s_data;
 803
 804         s_data.len = SMB_VFS_NEXT_PWRITE(handle, fsp, data, n, offset);
 805         s_data.filename = fsp->fsp_name->base_name;
 806         DEBUG(10, ("smb_traffic_analyzer_pwrite: PWRITE: %s\n", \
 807                 fsp_str_dbg(fsp)));
 808
 809         smb_traffic_analyzer_send_data(handle,
 810                         &s_data,
 811                         vfs_id_pwrite);
 812         return s_data.len;
 813 }
 814
 815 static int smb_traffic_analyzer_open(vfs_handle_struct *handle, \
 816         struct smb_filename *smb_fname, files_struct *fsp,\
 817         int flags, mode_t mode)
 818 {
 819         struct open_data s_data;
 820
 821         s_data.result = SMB_VFS_NEXT_OPEN( handle, smb_fname, fsp,
 822                         flags, mode);
 823         DEBUG(10,("smb_traffic_analyzer_open: OPEN: %s\n",
 824                 fsp_str_dbg(fsp)));
 825         s_data.filename = fsp->fsp_name->base_name;
 826         s_data.mode = mode;
 827         smb_traffic_analyzer_send_data(handle,
 828                         &s_data,
 829                         vfs_id_open);
 830         return s_data.result;
 831 }
 832
 833 static int smb_traffic_analyzer_close(vfs_handle_struct *handle, \
 834         files_struct *fsp)
 835 {
 836         struct close_data s_data;
 837         s_data.result = SMB_VFS_NEXT_CLOSE(handle, fsp);
 838         DEBUG(10,("smb_traffic_analyzer_close: CLOSE: %s\n",
 839                 fsp_str_dbg(fsp)));
 840         s_data.filename = fsp->fsp_name->base_name;
 841         smb_traffic_analyzer_send_data(handle,
 842                         &s_data,
 843                         vfs_id_close);
 844         return s_data.result;
 845 }
 846
 847
 848 static struct vfs_fn_pointers vfs_smb_traffic_analyzer_fns = {
 849         .connect_fn = smb_traffic_analyzer_connect,
 850         .vfs_read = smb_traffic_analyzer_read,
 851         .pread = smb_traffic_analyzer_pread,
 852         .write = smb_traffic_analyzer_write,
 853         .pwrite = smb_traffic_analyzer_pwrite,
 854         .mkdir = smb_traffic_analyzer_mkdir,
 855         .rename = smb_traffic_analyzer_rename,
 856         .chdir = smb_traffic_analyzer_chdir,
 857         .open = smb_traffic_analyzer_open,
 858         .rmdir = smb_traffic_analyzer_rmdir,
 859         .close_fn = smb_traffic_analyzer_close
 860 };
 861
 862 /* Module initialization */
 863 NTSTATUS vfs_smb_traffic_analyzer_init(void)
 864 {
 865         NTSTATUS ret = smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
 866                                         "smb_traffic_analyzer",
 867                                         &vfs_smb_traffic_analyzer_fns);
 868
 869         if (!NT_STATUS_IS_OK(ret)) {
 870                 return ret;
 871         }
 872
 873         vfs_smb_traffic_analyzer_debug_level =
 874                 debug_add_class("smb_traffic_analyzer");
 875
 876         if (vfs_smb_traffic_analyzer_debug_level == -1) {
 877                 vfs_smb_traffic_analyzer_debug_level = DBGC_VFS;
 878                 DEBUG(1, ("smb_traffic_analyzer_init: Couldn't register custom"
 879                          "debugging class!\n"));
 880         } else {
 881                 DEBUG(3, ("smb_traffic_analyzer_init: Debug class number of"
 882                         "'smb_traffic_analyzer': %d\n", \
 883                         vfs_smb_traffic_analyzer_debug_level));
 884         }
 885
 886         return ret;
 887 }